LVM Salvage Tools

Tools to scan and recover files from damaged LVM volumes.

Scan:

  ./scan.sh '/lvm-vol/path1'
  ./scan.sh '/lvm-vol/path2'
  ./scan.sh '/lvm-vol/path3'

Recover:

  ./recover.sh '/lvm-vol/path1'

The source tree is mirrored beneath /mnt/recovery:

  /lvm-vol/path1 -> /mnt/recovery/lvm-vol/path1
  /lvm-vol/path2 -> /mnt/recovery/lvm-vol/path2
  /lvm-vol/path3 -> /mnt/recovery/lvm-vol/path3

The scan creates uniquely named manifest/summary files under /mnt/recovery.

Classifications:

  SAFE
  LOST
  ETB_LOST
  ETB_SURVIVES
  UNKNOWN
  OTHER

Only SAFE files are recovered.

Safety:

• damaged LV must remain kernel read-only;
• /mnt/recovery must be a separate mounted filesystem;
• filesystem root "/" is refused;
• ".." is refused;
• each file is dumped by inode;
• dumped byte size must match inode size;
• existing same-size recovered files are skipped;
• at least 2 GiB free is preserved on /mnt/recovery.

Known dead ext4 block range: 3418636288 - 4395389951